//
//  UINavigationController+XM.m
//  XMNavigationController
//
//  Created by Ce Liu on 2018/6/6.
//  Copyright © 2018年 Ce Liu. All rights reserved.
//

#import "UINavigationController+XM.h"

static char kXMBackImage;

@implementation UINavigationController (XM)

- (void)setBackImage:(NSString *)backImage {
    objc_setAssociatedObject(self, &kXMBackImage, backImage, OBJC_ASSOCIATION_COPY);
}

- (NSString *)backImage {
    return objc_getAssociatedObject(self, &kXMBackImage);
}


@end
